Large LED folding screen liquid-electric system

Abstract

The utility model discloses a large LED folding screen hydraulic-electric system which comprises an oil tank assembly, the oil tank assembly comprises an oil tank and further comprises an oil pump communicated with the oil tank, and the oil pump is respectively connected with a first reversing valve, a second reversing valve, a third reversing valve, a fourth reversing valve, a fifth reversing valve and a sixth reversing valve through a main oil way. A first reversing valve is connected with six large screen first segmented oil cylinders, a second reversing valve is connected with six large screen second segmented oil cylinders, a third reversing valve is connected with six large screen third segmented oil cylinders, a fourth reversing valve is connected with three small screen first segmented oil cylinders, a fifth reversing valve is connected with three small screen second segmented oil cylinders, and a sixth reversing valve is connected with three small screen third segmented oil cylinders. The oil pump is electrically connected with the servo motor, and the flow of the oil pump is controlled by the servo motor. By using the electro-hydraulic system, the large LED folding screen can be folded and unfolded safely and simply at the limited space such as a rooftop.

Description

Technical Field

[0001] The utility model relates to the technical field of ship auxiliary construction, in particular to a large-scale LED folding screen hydraulic and electrical system. Background Art

[0002] Large-scale LED screens are usually installed on the rooftops of large shopping malls for advertising or program broadcasting. Such large integrated LED screens are usually 26 meters long and 14 meters wide. During installation, they are easily limited by the size of the rooftop space, which brings great difficulties to the installation operation. Therefore, only foldable large LED screens can be used.

[0003] There are many ways to fold and unfold large LED folding screens, but compared with other folding methods, the hydraulically controlled folding and unfolding method is the safest, most stable and simplest for operators. However, there is currently no hydraulic-electric system for large LED folding screens on the market.

[0004] Therefore, it is necessary to provide a large-scale LED folding screen hydraulic system to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide a large-scale LED folding screen hydraulic and electrical system to address the deficiencies in the prior art, which can safely and simply retract and unfold the large-scale LED folding screen in places with limited space such as rooftops.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A large-scale LED folding screen hydraulic and electrical system, including a tank assembly, the tank assembly including a tank, and also including an oil pump connected to the tank, the oil pump is respectively connected to a first reversing valve, a second reversing valve, a third reversing valve, a fourth reversing valve, a fifth reversing valve and a sixth reversing valve through a main oil circuit, the first reversing valve, the second reversing valve, the third reversing valve, the fourth reversing valve, the fifth reversing valve and the sixth reversing valve are all Y-type three-position four-way reversing valves, the P oil ports of the first reversing valve, the second reversing valve, the third reversing valve, the fourth reversing valve, the fifth reversing valve and the sixth reversing valve are connected in parallel to the main oil circuit, the T oil ports of the first reversing valve, the second reversing valve, the third reversing valve, the fourth reversing valve, the fifth reversing valve and the sixth reversing valve are connected in parallel to the oil return circuit connected to the tank, the first reversing valve is connected to six large A first screen segmented cylinder, a first synchronous motor group is arranged between the first reversing valve and the six large screen segmented cylinders, the first synchronous motor group includes six synchronous motors, the confluence port of the first synchronous motor group is connected with the A oil port of the first reversing valve, the rodless chambers of the six large screen segmented cylinders are connected one-to-one with the diversion ports of the six synchronous motors of the first synchronous motor group, the B oil port of the first reversing valve is connected with the rod chambers of the six large screen segmented cylinders, the second reversing valve is connected with the six large screen two segmented cylinders, a second synchronous motor group is arranged between the second reversing valve and the six large screen two segmented cylinders, the second synchronous motor group includes six synchronous motors, the confluence port of the second synchronous motor group is connected with the A oil port of the second reversing valve, the rodless chambers of the six large screen two segmented cylinders are connected with the six synchronous motors of the second synchronous motor group The diversion port of Da is connected one-to-one, the B oil port of the second reversing valve is connected with the rod chamber of the six large-screen two-segment cylinders, the third reversing valve is connected to the six large-screen three-segment cylinders, a third synchronous motor group is arranged between the third reversing valve and the six large-screen three-segment cylinders, the third synchronous motor group includes six synchronous motors, the confluence port of the third synchronous motor group is connected with the A oil port of the third reversing valve, the rodless chambers of the six large-screen three-segment cylinders are connected one-to-one with the diversion ports of the six synchronous motors of the third synchronous motor group, the B oil port of the third reversing valve is connected with the rod chamber of the six large-screen three-segment cylinders, the fourth reversing valve is connected to the three small-screen one-segment cylinders, a fourth synchronous motor group is arranged between the fourth reversing valve and the three small-screen one-segment cylinders, the fourth synchronous motor group includes three synchronous motors, the fourth The confluence port of the step motor group is connected to the A oil port of the fourth reversing valve, the rodless chambers of the three small-screen one-segment cylinders are connected one-to-one with the diversion ports of the three synchronous motors of the fourth synchronous motor group, the B oil port of the fourth reversing valve is connected to the rod chambers of the three small-screen one-segment cylinders, the fifth reversing valve is connected to the three small-screen two-segment cylinders, a fifth synchronous motor group is arranged between the fifth reversing valve and the three small-screen two-segment cylinders, the fifth synchronous motor group includes three synchronous motors, the confluence port of the fifth synchronous motor group is connected to the A oil port of the fifth reversing valve, the rodless chambers of the three small-screen two-segment cylinders are connected one-to-one with the diversion ports of the three synchronous motors of the fifth synchronous motor group, the B oil port of the fifth reversing valve is connected to the rod chambers of the three small-screen two-segment cylinders, the sixth reversing valve is connected to the three small-screen three-segment cylinders,A sixth synchronous motor group is provided between the sixth reversing valve and the three small screen three-section oil cylinders. The sixth synchronous motor group includes three synchronous motors. The confluence port of the sixth synchronous motor group is connected to the A oil port of the sixth reversing valve. The rodless chambers of the three small screen three-section oil cylinders are connected one-to-one with the diversion ports of the three synchronous motors of the sixth synchronous motor group. The B oil port of the sixth reversing valve is connected to the rod chambers of the three small screen three-section oil cylinders. The oil pump is electrically connected to the servo motor, and the flow rate of the oil pump is controlled by the servo motor.

[0008] Preferably, a first throttle valve group is provided between the first reversing valve and the first synchronous motor group, a second throttle valve group is provided between the second reversing valve and the second synchronous motor group, a third throttle valve group is provided between the third reversing valve and the third synchronous motor group, a fourth throttle valve group is provided between the fourth reversing valve and the fourth synchronous motor group, a fifth throttle valve group is provided between the fifth reversing valve and the fifth synchronous motor group, and a sixth throttle valve group is provided between the sixth reversing valve and the sixth synchronous motor group.

[0009] Preferably, an unloading valve and a safety relief valve are arranged in parallel between the main oil circuit and the return oil circuit.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] The use of this hydraulic system can install a large LED folding screen in a small space. The folding screen can be quickly and smoothly retracted and unfolded according to the needs of the site. The hydraulic system is controlled by the control center and does not require on-site operation. The operation is simple. The hydraulic system can make large LED folding screens suitable for more scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the principle diagram of the hydraulic-electric system of the utility model;

[0013] Among them, 1-oil tank, 2-oil pump, 3-servo motor, 4-first reversing valve, 5-second reversing valve, 6-third reversing valve, 7-fourth reversing valve, 8-fifth reversing valve, 9-sixth reversing valve, 10-large screen one-segment cylinder, 11-first synchronous motor group, 12-large screen two-segment cylinder, 13-second synchronous motor group, 14-large screen three-segment cylinder, 15-third synchronous motor group, 16-small screen one-segment cylinder, 17-fourth synchronous motor group, 18-small screen two-segment cylinder, 19-fifth synchronous motor group, 20-small screen three-segment cylinder, 21-sixth synchronous motor group, 22-first throttle valve group, 23-second throttle valve group, 24-third throttle valve group, 25-fourth throttle valve group, 26-fifth throttle valve group, 27-sixth throttle valve group, 28-unloading valve, 29-safety overflow valve DETAILED DESCRIPTION

[0014] The present invention is further explained below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that these implementation methods are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0015] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixed connection" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0016] In the present invention, the directions or positional relationships indicated by terms such as "upper", "lower", "bottom", "top", etc. are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention. They do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.

[0017] like Figure 1As shown, a large-scale LED folding screen hydraulic and electrical system includes an oil tank assembly, which includes an oil tank 1 and an oil pump 2 connected to the oil tank. The oil pump is electrically connected to a servo motor 3, and the flow rate of the oil pump is controlled by the servo motor. The oil pump is respectively connected to a first reversing valve 4, a second reversing valve 5, a third reversing valve 6, a fourth reversing valve 7, a fifth reversing valve 8 and a sixth reversing valve 9 through a main oil circuit. The first reversing valve, the second reversing valve, the third reversing valve, the fourth reversing valve, the fifth reversing valve and the sixth reversing valve are all Y-type three-position four-way reversing valves. The P oil ports of the first reversing valve, the second reversing valve, the third reversing valve, the fourth reversing valve, the fifth reversing valve and the sixth reversing valve are connected in parallel to the main oil circuit. The T oil ports of the valve, the fifth reversing valve and the sixth reversing valve are connected in parallel to the oil return circuit connected to the oil tank, the first reversing valve is connected to the six large-screen one-segmented cylinders 10, a first synchronous motor group 11 is installed between the first reversing valve and the six large-screen one-segmented cylinders, the first synchronous motor group includes six synchronous motors, the confluence port of the first synchronous motor group is connected to the A oil port of the first reversing valve, the rodless chambers of the six large-screen one-segmented cylinders are connected one-to-one with the diversion ports of the six synchronous motors of the first synchronous motor group, the B oil port of the first reversing valve is connected to the rod chambers of the six large-screen one-segmented cylinders, the second reversing valve is connected to the six large-screen two-segmented cylinders 12, a second synchronous motor group 13 is installed between the second reversing valve and the six large-screen two-segmented cylinders, the second synchronous motor group includes six The confluence port of the second synchronous motor group is connected to the A oil port of the second reversing valve, the rodless chambers of the six large-screen two-segment cylinders are connected one-to-one with the diversion ports of the six synchronous motors of the second synchronous motor group, the B oil port of the second reversing valve is connected to the rod chambers of the six large-screen two-segment cylinders, the third reversing valve is connected to the six large-screen three-segment cylinders 14, and a third synchronous motor group 15 is installed between the third reversing valve and the six large-screen three-segment cylinders. The third synchronous motor group includes six synchronous motors, the confluence port of the third synchronous motor group is connected to the A oil port of the third reversing valve, the rodless chambers of the six large-screen three-segment cylinders are connected one-to-one with the diversion ports of the six synchronous motors of the third synchronous motor group, and the B oil port of the third reversing valve is connected to the rod chambers of the six large-screen three-segment cylinders. The fourth reversing valve is connected to the three small-screen one-segment cylinders 16, and a fourth synchronous motor group 17 is installed between the fourth reversing valve and the three small-screen one-segment cylinders. The fourth synchronous motor group includes three synchronous motors. The confluence of the fourth synchronous motor group is connected to the A oil port of the fourth reversing valve. The rodless chambers of the three small-screen one-segment cylinders are connected one-to-one with the diversion ports of the three synchronous motors of the fourth synchronous motor group. The B oil port of the fourth reversing valve is connected to the rod chambers of the three small-screen one-segment cylinders. The fifth reversing valve is connected to the three small-screen two-segment cylinders 18. A fifth synchronous motor group 19 is installed between the fifth reversing valve and the three small-screen two-segment cylinders. The fifth synchronous motor group includes three synchronous motors. The confluence of the fifth synchronous motor group is connected to the A oil port of the fifth reversing valve.The rodless chambers of the three small-screen two-segment cylinders are connected one-to-one with the diverter ports of the three synchronous motors of the fifth synchronous motor group, the B oil port of the fifth reversing valve is connected with the rod chambers of the three small-screen two-segment cylinders, the sixth reversing valve is connected to the three small-screen three-segment cylinders 20, and a sixth synchronous motor group 21 is installed between the sixth reversing valve and the three small-screen three-segment cylinders. The sixth synchronous motor group includes three synchronous motors, and the confluence port of the sixth synchronous motor group is connected with the A oil port of the sixth reversing valve. The rodless chambers of the three small-screen three-segment cylinders are connected one-to-one with the diverter ports of the three synchronous motors of the sixth synchronous motor group, and the B oil port of the sixth reversing valve is connected to the three small The rod chamber of the three-section oil cylinder of the screen is connected. The first throttle valve group 22 is installed between the first reversing valve and the first synchronous motor group, the second throttle valve group 23 is installed between the second reversing valve and the second synchronous motor group, the third throttle valve group 24 is installed between the third reversing valve and the third synchronous motor group, the fourth throttle valve group 25 is installed between the fourth reversing valve and the fourth synchronous motor group, the fifth throttle valve group 26 is installed between the fifth reversing valve and the fifth synchronous motor group, the sixth throttle valve group 27 is installed between the sixth reversing valve and the sixth synchronous motor group, and the unloading valve 28 and the safety relief valve 29 are installed in parallel between the main oil circuit and the return oil circuit.

[0018] The principle and use method of a large-scale LED folding screen hydraulic system: the large-scale LED folding screen in a folded state is placed on the roof to be installed, and the hydraulic components are installed.

[0019] After the installation of all hydraulic components is completed, the large LED folding screen is unfolded. First, start the servo motor and the oil pump, and the 1DT end of the unloading valve is energized to pressurize the main oil circuit. The 2DT end of the first reversing valve is energized, and the oil flows to the first synchronous motor group through the PA oil port and the first throttle valve group. The six diversion ports of the first synchronous motor group distribute the oil evenly to the six large-screen one-segment cylinders through pipelines, and supply oil to the rodless chambers of the six large-screen one-segment cylinders, so that the large-screen one-segment is lifted, and the rod chamber of the large-screen one-segment cylinder returns the oil to the oil tank through the BT oil port of the first reversing valve.

[0020] After the lifting of the first section of the large screen is completed, the 4DT end of the second reversing valve is energized, and the oil flows to the second synchronous motor group through the PA oil port and the second throttle valve group. The six diversion ports of the second synchronous motor group distribute the oil evenly to the six large-screen two-section cylinders through pipelines, supplying oil to the rodless chambers of the six large-screen two-section cylinders, thereby lifting the two sections of the large screen. The rod chambers of the two-section cylinders of the large screen return the oil to the oil tank through the BT oil port of the second reversing valve.

[0021] After the two-section lifting of the large screen is completed, the 6DT end of the third reversing valve is energized, and the oil flows to the third synchronous motor group through the PA oil port and the third throttle valve group. The six diversion ports of the third synchronous motor group distribute the oil evenly to the six large-screen three-section cylinders through pipelines, and supply oil to the rodless chambers of the six large-screen three-section cylinders, thereby lifting the three-section of the large screen. The rod chamber of the large-screen three-section cylinder returns the oil to the oil tank through the BT oil port of the third reversing valve.

[0022] After the three-section lifting of the large screen is completed, the 8DT end of the fourth reversing valve is energized, and the oil flows to the fourth synchronous motor group through the PA oil port and the fourth throttle valve group. The three diversion ports of the fourth synchronous motor group distribute the oil evenly to the three small-screen one-section cylinders through pipelines, and supply oil to the rodless chambers of the three small-screen one-section cylinders, thereby lifting the small screen one section, and the rod chamber of the small screen one-section cylinder returns the oil to the oil tank through the BT oil port of the fourth reversing valve.

[0023] After the lifting of the small screen one section is completed, the 10DT end of the fifth reversing valve is energized, and the oil flows to the fifth synchronous motor group through the PA oil port and the fifth throttle valve group. The three diversion ports of the fifth synchronous motor group distribute the oil evenly to the three small screen two-section cylinders through pipelines, and supply oil to the rodless chambers of the three small screen two-section cylinders, thereby lifting the small screen two sections. The rod chamber of the small screen two-section cylinder returns the oil to the oil tank through the BT oil port of the fifth reversing valve.

[0024] After the two-segment lifting of the small screen is completed, the 12DT end of the sixth reversing valve is energized, and the oil flows to the sixth synchronous motor group through the PA oil port and the sixth throttle valve group. The three diversion ports of the sixth synchronous motor group distribute the oil evenly to the three small screen three-segment cylinders through pipelines, and supply oil to the rodless chambers of the three small screen three-segment cylinders, thereby lifting the three sections of the small screen. The rod chambers of the small screen three-segment cylinders return the oil to the oil tank through the BT oil port of the sixth reversing valve.

[0025] After the use of the LED folding screen, it can be gradually folded up. When folding it up, first start the servo motor and the oil pump, and the 1DT end of the unloading valve is energized to pressurize the main oil circuit. The 13DT end of the sixth reversing valve is energized, and the oil is evenly distributed to the small screen three-segment cylinder through the PB oil port and the sixth throttle valve group, supplying oil to the rod chamber of the small screen three-segment cylinder, so that the small screen three sections are retracted, and the rodless chamber of the small screen three-segment cylinder returns the oil to the oil tank through the AT oil port of the sixth reversing valve.

[0026] After the three-section retraction of the small screen is completed, the 11DT end of the fifth reversing valve is energized, and the oil is evenly distributed to the two-section cylinder of the small screen through the PB oil port and the fifth throttle valve group, supplying oil to the rod chamber of the two-section cylinder of the small screen, so that the two sections of the small screen are retracted, and the rodless chamber of the two-section cylinder of the small screen returns the oil to the oil tank through the AT oil port of the fifth reversing valve.

[0027] After the second section of the small screen is retracted, the 9DT end of the fourth reversing valve is energized, and the oil is evenly distributed to the first section cylinder of the small screen through the PB oil port and the fourth throttle valve group, supplying oil to the rod chamber of the first section cylinder of the small screen, thereby retracting the first section of the small screen, and the rodless chamber of the first section cylinder of the small screen returns the oil to the oil tank through the AT oil port of the fourth reversing valve.

[0028] After the small screen one section is retracted, the 7DT end of the third reversing valve is energized, and the oil is evenly distributed to the large screen three-section cylinder through the PB oil port and the third throttle valve group, supplying oil to the rod chamber of the large screen three-section cylinder, so that the large screen three sections are retracted, and the rodless chamber of the large screen three-section cylinder returns the oil to the oil tank through the AT oil port of the third reversing valve.

[0029] After the three-section retraction of the large screen is completed, the 5DT end of the second reversing valve is energized, and the oil is evenly distributed to the two-section cylinder of the large screen through the PB oil port and the second throttle valve group, supplying oil to the rod chamber of the two-section cylinder of the large screen, so that the two sections of the large screen are retracted, and the rodless chamber of the two-section cylinder of the large screen returns the oil to the oil tank through the AT oil port of the second reversing valve.

[0030] After the second section of the large screen is retracted, the 3DT end of the first reversing valve is energized, and the oil is evenly distributed to the first section cylinder of the large screen through the PB oil port and the first throttle valve group, supplying oil to the rod chamber of the first section cylinder of the large screen, so that the first section of the large screen is retracted, and the rodless chamber of the first section cylinder of the large screen returns the oil to the oil tank through the AT oil port of the first reversing valve. At this point, all sections of the entire LED folding screen are completely retracted.

[0031] The above description shows and describes the preferred embodiments of the utility model. As mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A large-scale LED folding screen hydraulic system, characterized by: The oil tank assembly includes an oil tank and an oil pump connected to the oil tank. The oil pump is respectively connected to a first reversing valve, a second reversing valve, a third reversing valve, a fourth reversing valve, a fifth reversing valve and a sixth reversing valve through a main oil circuit. The first reversing valve, the second reversing valve, the third reversing valve, the fourth reversing valve, the fifth reversing valve and the sixth reversing valve are all Y-type three-position four-way reversing valves. The P oil ports of the first reversing valve, the second reversing valve, the third reversing valve, the fourth reversing valve, the fifth reversing valve and the sixth reversing valve are connected in parallel to the main oil circuit. The T oil ports of the first reversing valve, the second reversing valve, the third reversing valve, the fourth reversing valve, the fifth reversing valve and the sixth reversing valve are connected in parallel to an oil return circuit connected to the oil tank. The first reversing valve is connected to six large-screen one-segmented oil cylinders. The first reversing valve is connected to the six large-screen one-segmented oil cylinders. A first synchronous motor group is arranged between the segmented cylinders, the first synchronous motor group includes six synchronous motors, the confluence port of the first synchronous motor group is connected with the A oil port of the first reversing valve, the rodless chambers of the six large-screen one-segmented cylinders are connected one-to-one with the diversion ports of the six synchronous motors of the first synchronous motor group, the B oil port of the first reversing valve is connected with the rod chambers of the six large-screen one-segmented cylinders, the second reversing valve is connected with the six large-screen two-segmented cylinders, a second synchronous motor group is arranged between the second reversing valve and the six large-screen two-segmented cylinders, the second synchronous motor group includes six synchronous motors, the confluence port of the second synchronous motor group is connected with the A oil port of the second reversing valve, the rodless chambers of the six large-screen two-segmented cylinders are connected one-to-one with the diversion ports of the six synchronous motors of the second synchronous motor group, the B oil port of the second reversing valve is connected The rod chambers of the six large-screen two-segment cylinders are connected, the third reversing valve is connected to the six large-screen three-segment cylinders, a third synchronous motor group is arranged between the third reversing valve and the six large-screen three-segment cylinders, the third synchronous motor group includes six synchronous motors, the confluence port of the third synchronous motor group is connected to the A oil port of the third reversing valve, the rodless chambers of the six large-screen three-segment cylinders are connected one-to-one with the diversion ports of the six synchronous motors of the third synchronous motor group, the B oil port of the third reversing valve is connected to the rod chambers of the six large-screen three-segment cylinders, the fourth reversing valve is connected to the three small-screen one-segment cylinders, a fourth synchronous motor group is arranged between the fourth reversing valve and the three small-screen one-segment cylinders, the fourth synchronous motor group includes three synchronous motors, the confluence port of the fourth synchronous motor group is connected to the A oil port of the fourth reversing valve, the three small The rodless chamber of the one-screen segmented cylinder is connected one-to-one with the diverter port of the three synchronous motors of the fourth synchronous motor group, the B oil port of the fourth reversing valve is connected with the rod chamber of the three small one-screen segmented cylinders, the fifth reversing valve is connected to the three small two-screen segmented cylinders, a fifth synchronous motor group is arranged between the fifth reversing valve and the three small two-screen segmented cylinders, the fifth synchronous motor group includes three synchronous motors, the confluence port of the fifth synchronous motor group is connected with the A oil port of the fifth reversing valve, the rodless chamber of the three small two-screen segmented cylinders is connected one-to-one with the diverter port of the three synchronous motors of the fifth synchronous motor group, the B oil port of the fifth reversing valve is connected with the rod chamber of the three small two-screen segmented cylinders, the sixth reversing valve is connected to the three small three-screen segmented cylinders, a sixth synchronous motor group is arranged between the sixth reversing valve and the three small three-screen segmented cylinders,The sixth synchronous motor group includes three synchronous motors, the confluence port of the sixth synchronous motor group is connected to the A oil port of the sixth reversing valve, the rodless chambers of the three small-screen three-segment oil cylinders are connected one-to-one with the diversion ports of the three synchronous motors of the sixth synchronous motor group, the B oil port of the sixth reversing valve is connected to the rod chambers of the three small-screen three-segment oil cylinders, the oil pump is electrically connected to the servo motor, and the flow rate of the oil pump is controlled by the servo motor.

2. According to claim 1, a large-scale LED folding screen hydraulic system is characterized in that: A first throttle valve group is provided between the first reversing valve and the first synchronous motor group, a second throttle valve group is provided between the second reversing valve and the second synchronous motor group, a third throttle valve group is provided between the third reversing valve and the third synchronous motor group, a fourth throttle valve group is provided between the fourth reversing valve and the fourth synchronous motor group, a fifth throttle valve group is provided between the fifth reversing valve and the fifth synchronous motor group, and a sixth throttle valve group is provided between the sixth reversing valve and the sixth synchronous motor group.

3. According to claim 1, a large-scale LED folding screen hydraulic system is characterized in that: An unloading valve and a safety relief valve are arranged in parallel between the main oil circuit and the return oil circuit.

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